Where does “kup-” come from?

kup- (Proto-Balto-Slavic) comes from Proto-Indo-European kwep- — to smoke, to steam; to boil; aroma, strong odor.

Ancestry of “kup-”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeankwep-to smoke, to steam; to boil; aroma, strong odor
Every word from Proto-Indo-European kwep-
kup- — Etymology, Origin & Word History | Etymology Explorer